Acoustic Research M4 Holographic Imaging Speakers. Pair of Floor Standing Speakers. Right and Left Speakers. MADE IN THE USA! Both speakers in the pair are new but one has minor exterior damage to the cabinet on one of the upper back corners (see pictures of damage). This damage occurred during transportation. The original box has been reinforced so that it arrives to you safely. ACOUSTIC RESEARCH M4 Holographic Imaging Speakers. Have the following features. Tweeter One ¾ (19mm) ferrofluid-cooled, ultrawide dispersion, low-resonance soft fiber dome tweeter (1.6kHz free-air resonance); louvered disperser grille. Midrange One 6 (165 mm) carbon/mica filled polypropylene cone woofer with natural rubber surround; free-air resonance of 32 Hz. Acoustic Suspension, high-style enclosure. Optimum Phase driver overlap and baffle offsets. Frequency Response 50 Hz-20 kHz 3 dB anechoic axis response. Sensitivity 88 dB SPL at 1 m for 2.83 V Input Amplifier Recommended Amplifiers rated for 4-8 ohms impedance/Power output 20-150 watts. WHAT IS HOLOGRAPHIC IMAGING? It’s the vivid recreation of the sonic space on a recording and the exact positioning of instruments and singers within that space. ANGLING THE WOOFER UPWARD. This projects smooth, flat sound at the critical crossover point directly toward your ear and ample hall-simulating midrange reverberation throughout the reflected sound. Imaging is no longer appreciated just in the “sweet spot:” The asymmetrical offset of the tweeter on its baffle improves imaging over a wider listening angle. BETTER GEOMETRY= BETTER IMAGING. Unique narrow cabinet baffle minimizes diffraction and reflection effects for superb stereo imaging. New low frequency design delivers more energy from a small cabinet and maximum performance in any location. AR’s ultrawide-dispersion, louvered 3/4 (19 mm) tweeters produce precision localization on axis, along with treble airiness throughout the room. It’s the best of both worlds. BETTER “REAL WORLD” FREQUENCY RESPONSE. Frequency response measured in a real, typical living room shows serious smoothness across the crucial, ear-sensitive midrange and upper midrange. This simply means better and more accurate sound. WOOFERS WITH POWERFUL BASS. Due to the new and improved woofers, these speakers demonstrate effortless bass performance. Rubber roll surrounds ensure the greatest excursion possible for the cone, combined with very low resonance. The acoustic suspension system that AR invented then maximizes the bass performance from the compact cabinet. DOME TWEETERS FOCUS CENTRAL STAGE. They project unconfined sound into the room rather than localizing it to the speakers. The result is a clear central stage that’s more enjoyable. Several types of dome materials have been used, each making its own special contribution to the sound. An all-aluminum dome that’s ferrofluid-cooled for low resonance. WHEN IS A CABINET NOT A CABINET? When it’s actually a performance component. The striking cabinet shape is unusually rigid and strong, minimizing panel talk. Non-parallel cabinet walls reduce internal standing waves that affect cone motion. So the loss of musical detail is minimized. Holographic Imaging crossovers are of minimalist design to reduce power loss and ensure the smoothest sound. The Biamping capability means cleaner playback with more power available for the potent bass and midbass. HIDDEN WOOFER SYSTEM HAS SLIM PROFILE, ASTOUNDING BASS. Superior deep bass from a smaller enclosure that’s been AR’s driving philosophy for four decades. In the M4, the enclosure means a smaller footprint in your living room, too. And with filtered acoustic suspension, it gets increased efficiency for the digital era. The control of a sealed woofer side with the sensitivity of the vented side is the best of both worlds. Dual vents at different spacings, furthermore, blend smoothly for accurate bass reproduction. Model: M4 Year Made: 1991 1994 Woofer: 6 Midrange: 6 Type: Cone Tweeter. The item “NEW! Pair of ACOUSTIC RESEARCH M4 Holographic Imaging Speakers Old School Stock” is in sale since Monday, December 18, 2017. This item is in the category “Consumer Electronics\TV, Video & Home Audio\Home Speakers & Subwoofers”. The seller is “donkiki2000″ and is located in Miami, Florida. This item can be shipped worldwide.
- Brand: Acoustic Research
- Model: Holographic Imaging M4
- Connectivity: Wired
- Country/Region of Manufacture: United States
- MPN: M4
- Form Factor: Floor-Standing Tower
- Audio Inputs: Banana Jack
- Configuration: Pair of Speakers
- Color: Charcoal Gray
- Sound Quality: High Fidelity (Hi-Fi)
- Speaker Design: 3-way
- Subwoofer Type: Passive
- RMS Power: 150W
- Shape: Spheric